#include <stdio.h> 
#include <unistd.h> 
#include <stdlib.h> 

int main() 
{ 
	pid_t id = fork(); 
	if(id < 0){ perror("fork"); return 1; } 
	else if(id == 0)
	{
		//child 
		printf("I am child, pid : %d\n", getpid()); sleep(10); 
	}
	else
	{
		//parent printf("I am parent, pid: %d\n", getpid()); 
		sleep(3); 
		exit(0); 
	} 
	return 0; 
}
